VTA Mk3 Octal Driver board mod to use 7193?

I was reading about the 7193: a single triode with G and A out to a top electrode for better HF characteristics (HF in the sense of RF). but some are saying its a great sounding audio tube. Since the VTA Octal driver board "wastes" a triode in the gain stage 6SN7, I was thinking modifying the board to use a 7193 might be a good idea: you'd not waste that 6SN7 triode and you'd get a better sounding result assuming the people who have switched to 7193's from 6SN7's in other amps they own are correct in that its a better sounding tube.

I might get my hands on a couple and some tube electrode caps and try this out. the 7193 is electronically equivalent to the 6SN7 so it would just be a matter of rewiring the socket a bit. and since the VTA design does not use the other triode this seems like an easy upgrade.

I ordered some NOS 7193's and some electrode caps. I'll make the mods and let you know how it sounds. it will take a few weeks to get everything together. should be a fun project and from what I have read the 7193's sound a lot better than 6SN7's

Thanks For your info on the MK3s,in this post an others. I well ck on cost from my tube guy on the $$ of the 7193.I have been useing the 6SN7 for driver in tube amps for years vary hard to beat the sound.well to me.goodluck

I bought a few 7193's on ebay NOS US Navy 1943 for about $9 per tube including shipping. so they are pretty cost effective. I'll have to run a top electrode for both G and P but that won't be a problem. and of course mod the circuit board to work with the 7193. i'll post how it works out.

cheap tubes? for $9? there are dozens of 6SN7s on ebay for around a $1 each, even nice quads for $6, of course, all slightly used, butI'll take those over a new production tube any day. Anyone tried the russian 6H8C which runs $3-4 each?